Developing a site survey for scientific ocean drilling on the Mauritanian continental margin

开展毛里塔尼亚大陆边缘科学海洋钻探现场调查

• 批准号: NE/W00996X/1
• 负责人: Mark Ireland
• 金额: $ 15.28万
• 依托单位: Newcastle University
• 依托单位国家: 英国
• 项目类别: Research Grant
• 财政年份: 2022
• 资助国家: 英国
• 起止时间: 2022 至 无数据
• 项目状态: 未结题
• 来源: https://gtr.ukri.org/projects?ref=NE%2FW00996X%2F1
• 关键词: Developing; site; survey; scientific; ocean

Large volumes of methane, a potent greenhouse gas, are stored on continental margins in shallow waters (e.g. <500m). These deposits, referred to as methane hydrates are widespread on continental margins and are considered to be one of the largest methane reservoirs that naturally exist. There is evidence from the geological record on the Mauritanian continental margin that potentially large volumes of methane have been released as a result of the methane hydrate destabilisation due to past increases in ocean temperatures and this will have entered the oceans and perhaps the atmosphere. The release of methane from hydrates during a warming world has been suggested previously be an important mechanism for changing the chemistry of the oceans and amplifying climatic change.The proposed project here will identify candidate scientific drilling sites to investigate the potential contribution that different climatic changes and different escape pathways might have on methane hydrate systems. The International Ocean Drilling Programme (IODP) is focused on addressing key questions about the Earth's history, in particular, understanding the connections between components of the Earth systems. This project will identify specific sites where scientific ocean drilling could provide the required data to understand in detail, the distribution of gas hydrates and how such a system responds to climatic shifts.

大量的甲烷是一种强温室气体，储存在大陆边缘的浅水沃茨（如<500米）。这些被称为甲烷水合物的矿床广泛分布在大陆边缘，被认为是天然存在的最大甲烷储藏之一。从巴拿马大陆边缘的地质记录中有证据表明，由于过去海洋温度的上升，甲烷水合物不稳定，可能释放了大量的甲烷，这些甲烷将进入海洋，也许还进入大气层。在全球变暖的过程中，甲烷从水合物中释放出来，这是改变海洋化学和放大气候变化的一个重要机制。这里的拟议项目将确定候选科学钻探地点，以调查不同气候变化和不同逃逸途径可能对甲烷水合物系统产生的潜在影响。国际大洋钻探计划（IODP）的重点是解决有关地球历史的关键问题，特别是了解地球系统各组成部分之间的联系。该项目将确定科学海洋钻探可以提供所需数据的具体地点，以详细了解天然气水合物的分布以及这种系统如何对气候变化作出反应。

项目成果

Long-distance migration and venting of methane after marine hydrate dissociation

海洋水合物解离后甲烷的长距离运移和喷发

• DOI: 10.21203/rs.3.rs-2604587/v1
• 发表时间: 2023
• 作者: Davies R

Long-distance migration and venting of methane from the base of the hydrate stability zone

甲烷从水合物稳定带底部的长距离运移和喷发

• DOI: 10.1038/s41561-023-01333-w
• 发表时间: 2023
• 期刊: Nature Geoscience
• 影响因子: 18.3
• 作者: Davies R